Chromium-hexavalent
CAS Number
18540-29-9Synonym
Chromium VI; Cr6; Chrom 6; Hexavalent chromium; Soluble hexavalent chromium compounds
Occurrence/Use
Production of stainless steel, textile dyes, wood preservatives, leather tanning, anti-corrosion and conversion coatings, electroplating
Soil Screening
| Last CHHSL revision: | 01/01/2005 |
|---|---|
| CHHSL Comments: |
For chemical-specific screening levels for use in assessing contaminated sites, please see HHRA Note 3 (DTSC HERO). https://www.dtsc.ca.gov/assessingrisk/humanrisk2.cfm |
Cancer Potency Information
| Latest Criteria: | California Public Health Goals |
|---|---|
| Inhalation Unit Risk (μg/cubic meter)-1: | 1.5 E-1 |
| Inhalation Slope Factor (mg/kg-day)-1: | 5.1 E+2 |
| Oral Slope Factor (mg/kg-day)-1: | 5.0 E-1 |
| Last Cancer Potency Revision: | 2011 |
| Comments/References: |
OEHHA 2011. Public Health Goals for Chemicals in Drinking Water: Hexavalent Chromium (Cr VI). Note: For Hot Spots risk assessments use the Hot Spots values. |
Air
Chronic REL
| Chronic Inhalation REL (μg/m3): | 0.2 (inhalation); 20 μg/kg BW-day (oral) |
|---|---|
| Chronic Target Organs: | Inhalation: Respiratory system. Oral: Hematologic system |
| Human Data: | No |
| Last Chronic REL Revision: | 2001 |
| Chronic Reference Exposure Levels Comments: |
OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D3
|
Proposition 65
MADL w/ File
Chemical Status
| Cancer: | Currently listed |
|---|---|
| Reproductive Toxicity : | Currently listed |
Cancer
| Listed as causing : | Listed as causing: Cancer |
|---|---|
| Date of Listing: |
Reproductive Toxicity
| Listed as causing: | Developmental Toxicity Male Reproductive Toxicity Female Reproductive Toxicity | Developmental Toxicity |
|---|---|
| Date of Listing: | |
| Basis for Listing : | State's Qualified Experts | Male Reproductive Toxicity |
| Date of Listing: | |
| Basis for Listing : | State's Qualified Experts | Female Reproductive Toxicity |
| Basis for Listing: | State's Qualified Experts |
Safe Harbor Levels
| Cancer | |
| Reproductive Toxicity | |
| Maximum Allowable Dose Level (MADL) - Oral: | 8.2 µg/day |
|---|---|
| Last NSRL/MADL Revision: | 2010 |
Documents, Presentations, and Publications
| Reproductive Toxicity: |
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Public notices related to this chemical
- Proposed Amendment To Section 25707(B), Route of Exposure: Hexavalent Chromium (VI)
- Notice of Amendment to Section 25707(B), Route of Exposure: Hexavalent Chromium (VI)
- Request for Relevant Information on the Developmental and Reproductive Toxicity of: Bisphenol-A, Chlorpyrifos, Chromium, DDE, Sulfur dioxide
- Hazard ID Materials for Hexavalent Chromium and Chlorpyrifos, Submission of Relevant Studies for Particulate Matter and Total Trihalomethanes
- Amendment To Section 25805 Specific Regulatory Levels: Chemicals Causing Reproductive Toxicity: Chromium (hexavalent compounds)
- Proposed Amendment To Section 25805 Specific Regulatory Levels: Chemicals Causing Reproductive Toxicity: Chromium (hexavalent compounds)
Water
California Public Health Goals Data
| Health Risk Category: | Carcinogenicity |
|---|---|
| Public Health Goal (mg/L): | 0.00002 |
| Public Health Goal - Download: | cr6phg072911.pdf |
| Cancer Risk at PHG: | 0.000001 |
| MCL value (mg/L): | 0.05 for total chromium |
| Cancer Risk at MCL: | Not Available |
| Last PHG Revision : | 2011 |
| California PHG Comments: |
The hexavalent chromium MCL of 0.01 mg/L (established July 1, 2014), by court order, is no longer in effect as of September 11, 2017. The previous MCL of 0.05 mg/L for total chromium remains in place while SWRCB develops a new MCL for hexavalent chromium. |